Journal
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Volume 208, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0067-0049/208/2/16
Keywords
planetary systems; planets and satellites: detection; techniques: miscellaneous; techniques: photometric
Categories
Funding
- European Research Council under the EU [291352]
- ISRAEL SCIENCE FOUNDATION [1423/11]
- NASA [NAS5-26555]
- NASA Office of Space Science [NNX09AF08G]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1109928] Funding Source: National Science Foundation
- European Research Council (ERC) [291352] Funding Source: European Research Council (ERC)
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Following the works of Ford et al. and Steffen et al. we derived the transit timing of 1960 Kepler objects of interest (KOIs) using the pre-search data conditioning light curves of the first twelve quarters of the Kepler data. For 721 KOIs with large enough signal-to-noise ratios, we obtained also the duration and depth of each transit. The results are presented as a catalog for the community to use. We derived a few statistics of our results that could be used to indicate significant variations. Including systems found by previous works, we have found 130 KOIs that showed highly significant times of transit variations (TTVs) and 13 that had short-period TTV modulations with small amplitudes. We consider two effects that could cause apparent periodic TTV-the finite sampling of the observations and the interference with the stellar activity, stellar spots in particular. We briefly discuss some statistical aspects of our detected TTVs. We show that the TTV period is correlated with the orbital period of the planet and with the TTV amplitude.
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